Earnings (Loss) Per Share (Detail) (USD $)	4 Months Ended	9 Months Ended
Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011
Weighted Average Number of Shares, Contingently Issuable	78,000	232,000		276,000
Restricted Stock Units (RSUs) [Member]
Weighted Average Number of Shares, Contingently Issuable	47,000	154,000		214,000
LTIP [Member]
Weighted Average Number of Shares, Contingently Issuable	31,000	74,000		60,000
Senior Subordinated Convertible Debt [Member]
Debt Instrument, Convertible, Conversion Ratio			9.7224
Initial Debt Instrument Convertible Conversion Ratio			9.3120
Debt Conversion, Converted Instrument, Amount (in Dollars)			1,000
Debt Instrument, Convertible, Conversion Price (in Dollars per share)	47.94		47.94

The ratio applied to the debt for purposes of determining the number of shares of the equity security into which the debt will be converted.

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Shares issuable for little or no cash consideration upon the satisfaction of certain conditions (contingently issuable shares) are considered outstanding common shares and included in the computation of basic Earnings Per Share as of the date that all necessary conditions have been satisfied (in essence, when issuance of the shares is no longer contingent). Outstanding common shares that are contingently returnable (that is, subject to recall) are treated in the same manner as contingently issuable shares. Contingently issuable shares include shares that (a) will be issued in the future upon the satisfaction of specified conditions, (b) have been placed in escrow and all or part must be returned if specified conditions are not met, or (c) have been issued but the holder must return all or part if specified conditions are not met. The number of contingently issuable shares is determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period.

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